lib/psd.rb in psd-2.1.0 vs lib/psd.rb in psd-2.1.1

@@ -30,13 +30,13 @@
 
   # Opens the named file, parses it, and makes it available for reading. Then, closes it after you're finished.
   # @param filename [String]  the name of the file to open
   # @return [PSD] the {PSD} object if no block was given, otherwise the value of the block
   def self.open(filename, opts={}, &block)
+    raise "Must supply a block. Otherwise, use PSD.new." unless block_given?
+
     psd = PSD.new(filename, opts)
     psd.parse!
-
-    return psd unless block_given?
 
     if 0 == block.arity
       psd.instance_eval(&block)
     else
       yield psd
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